What is defined as the invisible image formed on film after exposure but before processing?

The term that describes the invisible image formed on film after exposure but before processing is known as the latent image. This image is created when the film is exposed to radiation; however, it does not become visible until the film undergoes a processing routine. The processing involves various chemicals that convert the latent image into a visible one, allowing the details to show clearly.

The latent image is crucial in the field of radiography because it highlights the initial stages of image formation. Understanding this concept helps practitioners recognize the importance of proper film handling and the necessity of developing images under controlled conditions to reveal the diagnostic information contained within the exposure.

In contrast, the developed image refers to the final product that results after processing, while the processed image is essentially synonymous with the developed image. The visible image is the end result after the processing of the latent image but does not represent the initial stage that occurs right after exposure.